/Engine/Plugins/VirtualProduction/DMX/DMXEngine/Source/DMXRuntime/Public/Library/DMXEntityFixtureType.h
Inserts a Function to the Mode's Function Array
TheIndexof the newly added Function.
int32 InsertFunction ( int32 InModeIndex, int32 InInsertAtIndex, [FDMXFixtureFunction](API\Plugins\DMXRuntime\Library\FDMXFixtureFunction) & InOutNewFunction )